Generation of warm white light by doping Sm3+ in Ca3TeO6:Dy3+ fluorescent powders. Issue 9 (15th June 2020)

• Record Type: Journal Article
• Authors: Sun, Xianke; Huang, Zhenzhen; Fu, Xinhe; Xu, Liuyang; Liu, Kuili; Yuan, Honglei
• Is Part Of: Ceramics international. Volume 46:Issue 9(2020)
• Page Start: 14252
• Page End: 14256
• Publication Date: 2020-06-15
• Subjects: Ca3TeO6 -- Dy3+/Sm3+ doping -- Energy transfer -- Luminescence; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.02.058
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: For the purpose of generating warm white light, Ca3 TeO6 :Dy 3+, Ca3 TeO6 :Sm 3+ and Ca3 TeO6 :Dy 3+ /Sm 3+ fluorescent powders were manufactured through solid phase sintering process. The phase, luminescent characteristics and energy transfer process were researched. XRD patterns of Sm 3+ /Dy 3+ doped fluorescent powders demonstrate that they have the same phase with pure Ca3 TeO6 . Dy 3+ or Sm 3+ solely doped Ca3 TeO6 fluorescent powders exhibit emission bands corresponding to transitions of Dy 3+ or Sm 3+ . Dy 3+ /Sm 3+ codoped Ca3 TeO6 fluorescent powders exhibit emission bands originating from Dy 3+ and Sm 3+ . Due to energy transfer of Dy 3+ → Sm 3+ in Ca3 TeO6 :Dy 3+ /Sm 3+ fluorescent powder, adjustable luminescence was generated. Moreover, this energy transfer leads to the generation of warm white light in Sm 3+ codoped Ca3 TeO6 :Dy 3+ fluorescent powders. The results of the current work demonstrate that these fluorescent powders can be applied to warm white LEDs.